Feature/mobile ux3

[cs-util]

This pull request updates the main navigation and view layouts in the index.html file and improves the active tab styling logic in the JavaScript. The changes focus on enhancing the visual appearance, accessibility, and user experience of the navigation and view containers.

Navigation and Layout Improvements:

• Redesigned the main navigation bar in index.html to use circular icon buttons with improved accessibility (using aria-label, title, and sr-only spans), a new dark gradient background, and updated spacing. The navigation is now visually more prominent and modern.
• Adjusted the layout of main view containers (result-view, history-view, detail-view, settings-view) to add horizontal padding and top spacing, ensuring better alignment with the new navigation and improving readability on larger screens. [1] [2] [3] [4]

Tab Styling Logic Update:

• Updated the tab activation logic in src/ui/app.js to apply new styles for the active tab (emerald background, white text, shadow, and border highlight) and inactive tabs (darker background, lighter text, and subtle border), matching the new design.

[gemini-code-assist]

Summary of Changes

Hello @cs-util, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a significant enhancement to the mobile user experience by overhauling the application's navigation and view layouts. The changes introduce a modern, accessible navigation system and refine the visual presentation of content areas, ensuring a cohesive and visually appealing interface that improves overall usability.

Highlights

• Navigation Redesign: The main navigation bar in index.html has been completely revamped, transitioning from text-based tabs to circular icon buttons. This includes enhanced accessibility features like aria-label and sr-only spans, a new dark gradient background, and refined spacing for a more modern and visually prominent look.
• View Layout Adjustments: The layout of the main view containers (result-view, history-view, detail-view, settings-view) in index.html has been updated. These sections now include horizontal padding and increased top spacing to ensure better alignment with the new navigation and improved readability, especially on larger screens.
• Active Tab Styling Logic: The JavaScript logic in src/ui/app.js responsible for tab activation has been updated. It now applies new, distinct styles for active tabs (emerald background, white text, shadow, and border highlight) and inactive tabs (darker background, lighter text, and subtle border) to align with the new design aesthetic.

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[gemini-code-assist]

Code Review

This pull request introduces a significant visual and user experience overhaul for the main navigation and view layouts, which is a great improvement. The new icon-based navigation is modern and the accessibility considerations are well-implemented. My review includes a few suggestions to further enhance the code quality, focusing on consistent formatting in index.html, simplifying accessibility markup, and refactoring the JavaScript for better maintainability.

[gemini-code-assist]

The aria-label attribute is already providing the accessible name for this button, making the nested <span class="sr-only">Camera</span> redundant. To simplify the markup and avoid duplication, you can remove the span element. The title attribute is still useful as it provides a tooltip on hover for mouse users.

This feedback also applies to the 'History' and 'Settings' buttons.

          <button id="camera-tab" title="Camera" aria-label="Camera" class="secondary inline-flex h-12 w-12 items-center justify-center rounded-full border border-white/30 bg-slate-900/70 text-slate-200 shadow-sm transition focus:outline-none focus-visible:ring-2 focus-visible:ring-emerald-400 focus-visible:ring-offset-2 focus-visible:ring-offset-slate-900 hover:text-emerald-200" data-tab="camera" aria-current="page">
            <svg class="h-6 w-6" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
              <rect x="3.75" y="6.5" width="16.5" height="11.5" rx="2.5"></rect>
              <path d="M8.5 6.5L9.9 4.5c.2-.3.5-.5.8-.5h2.6c.3 0 .6.2.8.5l1.4 2"></path>
              <circle cx="12" cy="12.25" r="3.5"></circle>
              <circle cx="12" cy="12.25" r="1.5" fill="currentColor" stroke="none"></circle>
            </svg>
          </button>

[gemini-code-assist]

The indentation of this <section> element is inconsistent with its sibling camera-view section (line 57). To improve code readability and maintainability, all sibling elements under the views div should have the same indentation level. This issue is also present for the history-view (line 103), detail-view (line 114), and settings-view (line 154) sections.

        <section id="result-view" class="view hidden px-4 pt-24" aria-live="polite" aria-labelledby="result-heading">

[gemini-code-assist]

These consecutive classList.toggle calls are a bit repetitive. To improve maintainability and adhere to the DRY (Don't Repeat Yourself) principle, you can group the classes for active and inactive states into arrays and iterate over them. This makes the code cleaner and easier to update if the styles change in the future.

Suggested change

	button.classList.toggle('bg-emerald-500', isActive);
	button.classList.toggle('text-white', isActive);
	button.classList.toggle('shadow-lg', isActive);
	button.classList.toggle('border-emerald-200/80', isActive);
	button.classList.toggle('bg-slate-900/70', !isActive);
	button.classList.toggle('text-slate-200', !isActive);
	button.classList.toggle('border-white/30', !isActive);
	const activeClasses = ['bg-emerald-500', 'text-white', 'shadow-lg', 'border-emerald-200/80'];
	const inactiveClasses = ['bg-slate-900/70', 'text-slate-200', 'border-white/30'];
	activeClasses.forEach(cls => button.classList.toggle(cls, isActive));
	inactiveClasses.forEach(cls => button.classList.toggle(cls, !isActive));